Security means for closure cabinets



Feb. 10, 1959 H. c. MILLER ET AL 2,873,162 SECURITY MEANS FOR cLosuRECABINETS Feb. 10, 1959 H. c. MILLER ETAL SECURITY MEANS FOR CLOSURECABINETS 2 Sheets-Sheet 2 Filed Sept. 19, 1956 INVENTORS y wenn www. MMwww ATTORNEYS v 2,873,162 SECURITY MEANS FOR CLOS'URE CABINETS Harry C.Miller and James L. Taylor, Rochester, N. Y., and Howard M. McCoy,Severna Park, Md. Application September 19, 1956, Serial No. 610,758 sClaims. (ci. en -297) The present invention relates in general to tilecabinets and like protective receptacles for valuables, and moreparticularly to multidrawer file cabinets having disappearing protectivecurtain or shielding means and cooperating combination lock mechanism.

Maintenance of proper security with respect to valuable papers andwritings, which are normally housed in multidrawer file cabinets whennot in use, requires, as a practical measure, the provision of somefacility for locking the tile cabinet drawers in closed condition inorder to preserve the contents and secrecy and protect them fromunauthorized inspection when the premises are unoccupied. The mostconventional expedient for accomplishing this has been by adaptation ofthe le cabinet to receive a locking bar or the like which is padlockedto the frame in a position to retain the iile cabinet drawers in closedposition. Usually, vertically aligned iixed hasps or staples areprovided at spaced locations on the front of the le cabinet, usually onthe bottom horizontal frame member and an intermediate horizontalparting strip, into which the elongated steel locking bar ofapproximately the height of the front face of the le cabinet is insertedwhen the drawers are in closed position to overlie the drawer fronts.The bar is usually provided with an aperture adjacent the upper endthereof through which another hasp or staple fixed at the upper end ofthe iile cabinet is projected to receive a padlock, or the bar` isprovided with a rearwardly oset ange which is apertured to receive alike hasp or staple projecting from the top wall of the cabinet.Numerous practical disadvantages attend this arrangement. The totalexposure of the bars at the exterior of the iile cabinet renders themreadily subject to tampering by unauthorized personnel. The necessity ofwholly removing the bars from the cabinet and storing them inout-of-the-way places while the le cabinets are in use during workinghours presents space and storage problems, and the assembly anddisassembly of such bars in locking position on the file cabinet aretime-consuming procedures.

Resort has also been had to providing internal locking linkages wherebya control lever manipulated by an axial and reciprocable cylinder of acylinder lock mounted in the front wall of the tile cabinet controls avertical link housed within the cabinet for depressing lock levers whichcooperate with keeper mechanisms on each of the tile cabinet drawers t'orelease the levers from locking relation with the drawers. Such internallock linkage mechanisms, however, significantly increase the complexityand cost `of production of the tile cabinet,` and due to the veryexacting tolerances which must be observed, in `order to maintaineffective high security operation` of the locking mechanism over longperiods of time, and the continual wear to which the cooperating lockingparts are subjected, the degree of security which may be realized overlong periods of time is not up to desired standards.

An object of the present invention, therefore, is the provision of anovel security file cabinet construction which may be readilyconditioned in a very short period of time to protect the contentsagainst unauthorized inspection or surreptitious entry into the cabinet.

Another object of the present invention is the provision of a novelsecurity file cabinet construction having means incorporated in the tilecabinet which may be readily disposed iu a concealed position therein orpositioned to bar United States Patent ice whereby a high degree ofsecurity against unauthorized j inspection of the contents may berealized over long periods of time. t

Another object of the present inventionA is the provision of a novelmultidrawer security file cabinet which may be readily locked by asimple padlock to preserve the contents of the le cabinet drawersagainst inspection, having improved eciency and securitycharacteristics.

Other objects, advantages and capabilities of the present invention willbecome apparent from the following detail description, taken inconjunction with the accompanying drawings illustrating two preferredembodiments of the invention. t

In the drawings:

Figure l is a perspective view ofthe file cabinet constructed inaccordance with the present invention;

Figure 2 isa fragmentary vertical section view taken along the line`2-2of Figure 1, illustrating the file cabinet in locked condition;

Figure 3 is a vertical section View taken from .the same section plan asFigure 2, but illustrating the file cabinet in unlocked condition;

Figure 4 is a horizontal section view taken along the line 4--4 ofFigure 2;

Figure 5 is a fragmentary vertical section view illustrating `the mannerin which the curtain controlling slide is movably supported in the tilecabinet, taken along the line 5-5 of Figure 1;` and Figure 6 is afragmentary vertical section view through the curtain controlling slideand tile cabinet front parting plate of a modified formtof the presentinvention adapted for use with exposed shackle padlocks.

Referring to the drawings, wherein like reference characters designatecorresponding parts throughout the several figures, and particularly toFigures l-5, inclusive, showing the first embodiment of the presentinvention, the present invention is incorporated in a`1ile` cabinet,generally indicated by the reference character `10 which is of themultidrawer'type having preferably an even number of tile cabinetdrawers such as,` for example, the four drawers 11, 12,' 13 and 14,illustrated in Figure 1. The drawers 11-14 are arranged inA a verticaltier and each are preferably of conventional construction including Iarectangular drawer front 15 havingthe usual drawer pull.16 projectingforwardly therefrom. `The drawers are suitably supported in accordancewith conventional practice for rectilinear horizontal movement between aclosed position wherein they arecornpletely housed within the iilecabinet 10 between the side walls 17, 18 rearwardly of the cabinet front19 and an exposed position whereina major portion of the drawer projectsforwardly of the cabinet front 19. The side walls 17, 18, the top wall20 and the rear wall 21, are preferably formed of sheet metal inaccordance with conventional practice,

1 l] and reinforced in the usual manner to provide suitable rigidity.The cabinet `front 19, however, comprises a rectangular marginal frameformed by vertical side rails` 22 and 23 lying at the lateral corners ofthe cabinet front 19 adjacent the forward end of the side walls 17, 18and `top and bottom transverse marginal rails 24 and 25,

respectively. An intermediate transverse parting plate 26 extendsbetween and is rigidly secured to the side rails 22, 23` `and is`disposed in parallelism with the top and bottom rails 24, 25 spacedequally from the top and bottom,rails.V All of` these rails 2225 and theplate `26 lie in a' vertical plane and deline an upper rectangularopening 27 and a lower rectangular opening 28 in the cabinet front 19for movement` of the drawers .1l-14 therethrough to and from closedposition. t

Rearwardly spaced from the vertical plane of the rails..

22425 and intermediate parting plate 26 is a secondary frame 29 whichlikewise is disposed vertically and is provided with rectangularopenings 30 into which the drawer fronts are adapted to be received inllush coplanar relation with the secondary frameV 29 when the drawersare in closed position. Between the in-turned anges 22', 23 of thevertical rails 22, 23 and the forward edges of the secondary frame 29,there are provided a pair of inwardly opening C-shaped channel members31, 32 disposed behind the upper opening 27 and a pair of inwardlyopening C-shaped channels 33 and 34 located behind the lower rectangularopening 28. The pair of upper channels 31, 32 form a guide track for ametallic closure curtain 35 for the upper opening 27 and the channels33, 34 form guide tracks for a metallic closure curtain 36 for the loweropening 28. Each of the channels 31-34 comprises a web 37 aflixed to theadjacent side wall of the cabinet, channel sides 38 projectingperpendicularly inwardly from the adjacentcabinet side Walls, andterminal flanges 39 defining a restricted opening to the channel. VThechannels are bent at right angles along a smooth curve as indicated at40 at substantially the longitudinal center of each channel Iand areaffixed to the cabinet side walls 17, 18` in a position to provide avertical leg 41 opening immediately rearwardly of the side rail flanges22', 23' and a horizontal leg 42 extending rearwardly to the rear wall21 of the cabinet with the boundary of the channel opening at theuppermost channel flange 39 lying substantially in horizontal alignmentwith the upper edge of the intermediate parting plate 26. It will benoted that the vertical legs 41 of the upper channel tracks 31, 32 risevertically from a location adjacent the upper edge of the intermediateparting plate 26 and the vertical legs 41 of the lower channel tracks33, 34 depend from a region adjacent the lower edge of the intermediateparting plate 26.

The closure containers 35, 36 are each formed of narrow transverse slats43 preferably formed of a hard sheet metal which will substantiallyresist tampering in attempts to penetrate the same, the opposite lateralmarginal edges of each of the slats 43 being provided with substantiallycylindrically curved anges 44 curved about axes parallel to thelongitudinal axes of the slats and opening in opposite directionswhereby the ends of the curved anges 44 of each pair of adjacent-.slats43 may be interlitted with each other to permit pivotal movement ofthe`slats relative to each other about their interconnected' flanges 44.Suitable rods 45 are suitably secured to the opposite ends of each slat43 or selected spaced slats 43 forming the curtains 35, 36 and projectinto the channel tracks 31-34 to be guided thereby. If desired, suitablerollers or enlarged washers 46 may be provided on the ends of the rods45 to relieve friction between the rods and the channel tracks andrestrain lateral movement of the curtains. Cap and base channels 47 aresecured transversely of the cabinet at the upper and lower ends of thevertical legs 41 of the channel tracks to form seating recesses for thecurtains 35, 36 when the same are in closed position covering theopenings 27, 28.

In Vthe preferred embodiment of Figures l-5, a high security combinationlock 48 is supported centrally on the intermediate parting plate 26 tolock the closure curtains 35, 36 in closing position. The combinationlock 48, in the illustrated embodiment, is of the type comprising aplurality of coaxial rotary tumbler disks and driving cam housed withina lock casing 49 mounted on the rear face of the intermediate partingplate 26 and having a reciprocable bolt 50 projectable therefrom alonganaxial parallel to the longitudinal axis of the plate26, together withdial assembly 51 including a dial and knob 52 connected with themechanism in the casing 49 by means of a spindle for manipulating thetumblers and driving cam to eiect withdrawal of the bolt 50 from itsnormally projected condition when locked. A curtain controlling slidemember 53 extends 1 transversely of the cabinet immediately behind theintermediate parting plate 26 and is substantially coextensive in lengthwith the plate 26. The slide member 53 preferably is formed of achannel-shaped member having horizontally disposed channel sides 54 andis arranged to accommodate the lock casing 49 ytherebetween when 'theslidev member 53 is drawn to its forwardmost position as illustrated inFigure 2. this may be accomplished by disposing the web 55 of thechannel forming the slide 53 forwardly and forming an aperture 56therein of sufficient size to accommodate the lock housing 49, or bypositioning the web of the channel rearwardly so that the channel facesforwardly to receive the lock housing 49 therein. ln the embodimentillustrated in Figure 2, wherein the channel web 55 is disposedforwardly, a secondary channel member 57 is seated between the channelsides S4 with its web disposed rearwardly and is Welded or otherwiserigidly secured to the slide channel S3. The secondary channel 57 has,in addition to the horizontally arranged upper and lower channel sides5S, opposite channel ends 59 whereby it cooperates with the primaryslide channel 53 to form a protective enclosure for the sides and rearcover plate of the lock casing 49 to resist tampering with the lockhousing. ln thislembodiment, a keeper block 60 is welded to one of thesecondary` channel ends 59 as illustrated in Figure 4 which presents ashoulder to the lock bolt 50 when the boltis in projected position toprevent movement of the slide 53 rearwardly of the intermediate lpartingplate 26. To effect rcciprocative sliding movement of the slide member53 along a horizontal axis from the front to the rear of the cabinet, apair of elongated inwardly opening channel tracks 61 are affixed toopposite sidel Walls 17, 18 of the cabinet between the horizontal legs42 of the upper and lower channel tracks 31-34, to receive between theirchannelsides projecting stub shafts or trunnions 62 fixed and projectingoppositely from the end walls 63 of the slide channel member 53. Theends of the shafts or trunnions 62 may either be integral formationsdesigned to snugly nest within the channel tracks 61 or may be providedWith rollers or the like for relieving friction between the relativelymovable members. A pair of such stub shafts or tru'nnions 62 which arein horizontal alignment with each other are preferably provided on eachend wall` 63 to resist canting movement of the slide 53. f v i Anchoringstraps `64 of substantially the width of the slats 43 have cylindricallycurved flanges 65 adapted to interlock with the lower flange 44 of thelowermost slat of upper curtain 35 and the upper flange 44 of theuppermost slat of lower curtain 36 to interconnect the closure curtainswith the slide 53K'and simultaneously control their movement from theslide.

ln the embodiment shown in Figures l-S the slide 53 is reciprocatedmanually by means of a disconnectable tubular rod 66 having a knurledhead 67 projecting through a suitable aperture in the intermediateparting plate 26 to an exposed position forwardly of the parting plate.The' tubular rod 66 is guided for rectilinear reciprocative movement bya guide rod 68 affixed tothe rear wall 21 of the cabinet and: telescopedinto the tubular rod 66. The rear end` of the control rod 66 carries aradially projecting disk sector 53. l The' aperture 72 is over the majorportiony of its circumference of corresponding cross-section to theytubular control rod 66 and is provided with a"`relieved portionl` 73l`over a portion of its circumference to ac-l commodate'the disk' section69 on the control rod 66.

In the use ofthe above-described embodiment,y assuming the drawers toybein closed position, `as illus-f trated in Figure 2, with the closurecurtains 35-36 in closed condition and ythe lock 48` in' lockedcondition, the cabinet -is unlocked and opened for use by manipulatingthe dial knob 52 to establish the combination and actuate the tumblersto withdraw the bolt 50 from behind the keeper block 60. The tubularcontrol rod 66 is then withdrawn outwardly of the tile cabinet to drawthe disk sector 69 into registry with the aperture 72 1n the web 55 ofthe slide 53 with the disk sector 69 oriented inalignment with therelieved portion 73 of the aperture. The control rod 66 is then rotatedto intert the tongue 71 bounding the aperture 72 into the sector groove70 and the tubular rod 66 maythen be projected rearwardly of the lecabinet along the guide rod 68 to shift the slide 53 to a rearmostposition adjacent the rear `wall 21. -This rearward movement of theslide, through the interconnection of the anchor straps 64 with theslats of the upper and lower closure curtains 35, 36 draws the closurecurtains `along their tracks `31-34 to` a position wherein the curtainslie su'bstantially wholly within the horizontal leg portions 42 of thetracks 31-34. In this condition, terminal slats of the curtains 35, 36are disposed out of the path of movement of the drawers 11-14 and permitfree access to the drawers and their contents. Reversal of theabove-described procedure will effect return of the curtains 35, 36 toclosed position and repositioning of the slide at its forwardmostposition immediately behind the intermediate parting plate 26 where,upon manipulation of the dial 52 toirelock the lock 48, thel bolt 50will be projected into position behind the keeper block 60 to retain thecurtains in closed position.

If desired, the rearwardly opening channel member comprising the channelsides 54 and web 55 may be dispensed with and the slide formed from asingle forwardly opening channel member similar to the channel member 53which opens forwardly to accommodate the combination lock casing 48therein. In this event, the channel member 53 will correspond to thewidth of the channel member which was dispensed with, and the aperture72 designed to cooperate with the control rod 66 will be formed in' therearwardly disposed web of the channel 53.

Figure 6 shows a further alternative arrangement wherein the principlesof the above-described embodiment are incorporated, but the specicstructure is modified to accommodate a conventional exposed shacklepadlock. In this embodiment, the intermediate parting'plate 26 isprovidedwith a central vertically elongated rectangular aperture 75adapted to accommodate a tongue 76 projecting from a Vertical plate 77which conforms to the cross section of the channel formed by theslide-forming channel member 53' having horizontal channel sides 54extending between the sides 17, 18 of the le cabinet and a forwardlydisposed channel web 55' having an aperture 78 through which the tongue76 is projected. The plate 77 is preferably welded or otherwise rigidlyfixed to the slide channel 53' and the tongue 76 is provided with acircularaperture 79 which is located to lie forwardly of the frontsurface of the intermediate `parting plate 26' when the slide 53' is inits forwardmost position to receive the shackle 80 of a shackle padlock81. Upper and lower closure curtains 35, 36 are anchored to the channelsides 54 of the Vslide channel 53 in the samemanner as described inconnection with the embodiment of Figures l-5. In the embodiment ofFigure 6, however, the control rod 66 anduassociated components aredispensed with and a handle 82 is provided on the uppermost slat 43 ofthe upper curtain 35 so that the curtains may be directly manipulated toshift the same to and from closed position. It will be understood thatdue to the disposition of the anchoring straps 64 in a position whichwill dispose the lowermost and uppermost slats 43 ofthe upper and lowercurtainsSS, 36 in vertical `alignmentwith `the remainder of the slatswhen the curtains are in closed position, it will be necessary Vtomanuallyyforce` these slats 6 rearwardly overa slight portion of theinitial movement of the slide, either by directly engagingthe slats orby forcing the slide 53' rearwardly by engagement of the tongues 76, inorder to relieve the binding action which arises when the slide 53 is inforwardmost: position.

While several embodiments of the invention have been shown or described,it is apparent that other modifica'- tions may be made in the inventionwithout departing from the spirit and scope thereof, and it is desired,therefore, thatonly such limitations shall be placed thereon as areimposed by the prior art and are set forth in the appended claims.

We claim:

1. A security closure for valuables and the like, comprising a housingcabinet including an elongated access wall having longitudinally spacedaccess openings aifording admission to the interior of the cabinetinterspersed by a medial transverse parting member, shielding meansassociated with each of said access openings for selectively Vcoveringthe same to deny admission to said interior comprising a plurality offlexible curtains corresponding to the number of access openings adaptedto be shifted into p a completely covering relation with said accessopenings, each openinghaving a separate curtain associated therewith,slideway means associated with each of said access `openings slidablysupporting said curtains for' movement from a closure position whereinsaid curtains extend oppositely longitudinally along said .access wallfrom said parting member in covering relation to said openings to areceded position wherein said curtains are withdrawn from said accesswalls into said cabinet along normals of the medial access wall portionoccupied by said parting member for exposing said access openings, acurtain .controlling slide member supported for rectilinearreciprocative movement within said cabinet along a plane lyingperpendicularly to said parting member and extending inwardly of thecabinet, means positively intercoupling said slide member with both ofsaid curtains for positioning said curtain means in accordance wth theposition of said slide member, said slide member positioning` saidcurtains in cabinet closing position when said slide member is at onelimit position adjacent said parting member and withdrawing saidcurtains into said receded position upon movement of said slide memberaway from said parting member, and means associated with said partingmember for positively locking said slide member at said limit positionto retain said curtains` in cabinet closing position. Q

2. A security closure for valuables and the like, comprising a housingcabinet including an elongatedfront wall having longitudinally spacedaccess openings affording admission to the interior of the cabinetinterspersed by a medial transverse parting member, shielding meansassociated with each of said access openings for selectively coveringthe same to deny admission to said interior comprising a flexiblecurtain associated with each of said access openings for selectivelycovering the same, opposed inwardly opening slideway grooves xed withinsaid cabinet for slidably supporting the curtains associated with saidopenings, said grooves including groove' portions receding within saidcabinet along normals of said front wall extending rearwardly of thefront wall from a position adjacent said parting member for housing saidcurtains in said cabinet substantially within4 the normal projection ofsaid parting member to withdraw said curtains from covering relationwith said access openings, and longitudinally spaced groove portionsforming a continuous groove with said receding groove portions andextending in opposite directions in a common plane longitudinally ofsaidfront wall from said parting member for positioning said curtains incovering relation with said access openings, a curtain controlling slidemember supported for rectilinear reciprocative movement 'within saidcabinet within the normal projection of said parting member from onelimit position adjacent said parting member toa rearwardly spacedposition remote therefrom, means interconnecting said curtains with saidslide member. for placing the position oi said curtains under control ofsaid slide member, said curtains' being disposed in cabinet closingposition when said slide member is at said limit position, and meansassociated with said parting member for locking said slide member atsaid limit position.

3. In a security ilecabinet of the type having a vertical front wallhaving an even number of vertically aligned drawer openings andhorizontally reciprocative drawers supported in said drawer openings formovement normal to said front wall, a marginal frame for said front wallprojecting `forwardly ot' the plane of said front wall having a medialtransverse parting plate located between the pair of drawer openingsadjacent the bisecting axis of said front wall and lying in the plane ofsaid marginal frame to define an upper access opening for the drawersabove said bisecting axis and a lower access opening for the drawersbelow said bisecting axis, upper; and lower opposed inwardly openingslideway grooves fixed within said cabinet associated respectivelywith'said uppcr'and lower access openings, said upper grooves having avertical portion rising from a point adjacent said parting plate withinthe plane of said marginal frame for the height of said upper accessopening and said lower grooves having a vertical portion depending froma point adjacent said parting plate in the plane of said marginal framefor the height of said lower marginal opening, and each of said grooveshaving a horizontal portion receding from said parting plate in spacedparallel relation with each other and with the normal plane of saidparting plate and a curved portion interconnecting said horizontalportions with said vertical portions to form continuous channelslideways, a exible curtain associated with each of.

said access openings slidably mounted in said grooves for movement froma vertical cabinet closing position overlying said drawers to a recededposition in the curved and horizontal portions of said groove out of thepath of movement of said drawers, a slide carriage interconnecting saidcurtains for coordinating movement of the same under control of saidslide carriage, means supporting said slide carriage for reciprocativemovement between said horizontal groove portion from a irst limitposition adjacent said parting plate wherein said curtains are retainedin a common vertical plane covering said access openings to a secondrearwardly spaced limit position wherein said curtains are withdrawninto receded position, and means cooperating with said parting plate forpositively locking said slide carriage at said irst limit position.

4. In a security file cabinet of the type having a vertical front wallhaving an even number of vertically aligned drawer openings andhorizontally reciprocativek drawers supported in said drawer openingsfor movement normal to said front wall, a marginal frame for said frontwall projecting forwardly of the plane of said front wall having amedial transverse parting plate located between the pair of draweropenings adjacent the bisecting axis of said front wall and lying in theplane of said marginal frame to define an upper access opening for thedrawers above said bisecting axis and a lower access opening for thedrawers below said bisecting axis, upper and lower opposed inwardlyopening slideway grooves ixed within said cabinet associatedrespectively with said upper and lower access openings, said uppergrooves having a vertical portion rising from a point adjacent saidparting plate within the plane of said marginal frame for the height ofsaid upper access opening and said lower grooves having a verticalportion depending from a point adjacent said parting plate in the planeof said marginal frame for the height of said lower marginal opening,and each of said grooves having a horizontal portion receding from saidparting plate in spaced parallel relation with each other and with thenormal plane of said parting plate anda curved portion interconnectingsaid horizontal portions with said vertical portions to form continuouschannel slideways, a flexible curtain associated with each of saidaccess openings slidably mounted in said grooves for movement from avertical cabinet closing position overlying said drawers to a recededposition in the curved and horizontal portions of said groove out of thepath of movement of said drawers, a slide carriage interconnecting saidcurtains for coordinating movement of the same under control of saidslide carriage, a pair of transversely aligned tracks in said cabinetlying between said horizontal groove portion and extending rearwardlyfrom said parting plate for guiding said carriage, rollers supportingsaid carriage on said tracks for rectilinear reciprocative movement froma first limit position adjacent said parting plate wherein said curtainsare retained ina common vertical plane covering said access openings toa second rearwardly spaced limit position wherein said curtains yarewithdrawn into receded position, said slide carriage having a keeperthereon, and lock means mounted on said parting plate having areciprocative bolt projectable into interlock relation with said keeperwhen said slide carriage is at said first limit position to lock saidcurtains in cabinet closing position.

5. A security closure for valuables and the like, comprising a housingcabinet including a vertical front access wall having a pair ofvertically spaced access openings alording admission to the interior ofthe cabinet, a parting plate lying in a vertical plane extendingtransversely across said front wall centrally of the height of saidwall, the upper and lower edges of said parting plate forming adjacentbounding walls for said pair of access openings, shielding meansassociated kwith each of said access openings for selectively coveringthe same to deny admission to the interior of thecabinet comprising aflexible curtain associated with each of said access openings forselectively covering the same, curtain guide tracks ixed within saidcabinet for slidably supporting said curtains including vertical trackportions lying in a common vertical plane extending for the height oftheirassociated access opening and connecting horizontal track portionsextending inwardly of the cabinet from a point adjacent said partingplate of a length to accommodate the entire associated curtain withinsaid last mentioned track portion, a lock supported on said partingplate having a lock casing lying inwardly of said parting plate andincluding a reciprocative bolt projecting parallel to the plane of saidparting plate from said lock casing, apair of horizontally aligned slidetracks tixed within said cabinet and extending rearwardly from saidparting plate, a curtain controlling slide carriage supported forrectilinear reciprocative movement within said cabinet on said slidetracks from one limit position immediately adjacent the inner surface ofsaid parting plate to a rearwardly spaced position remote therefrom,said slide carriage comprising a forwardly opening horizontal channelpositioned to receive said lock casing in nested relation therein whensaid carriage occupies said limit position and having a keepercooperatve with said lock bolt for holding said carriage againstdisplacement from said limit position when said lock bolt is projected,means positively interconnecting said curtains with said slide carriagefor simultaneously moving said curtains under control of said slidecarriage, and control means coupled to said slide carriage andprojecting to an exposed position externally of said cabinet yfor manualshifting of said slide carriage along said slide tracks.

References Cited in the iile ofthis patent UNITED STATES PATENTS 517,122McGrath Mar. 27, 1894 538,430 McKenzie Apr. 30, 1895 1,950,927 McMillanMar. 13, 1934 2,567,536 Wolters Sept. 11,1951

